#TheNationalAeronauticsandSpaceAdministration; #NASA; #blackhole; #TheEventHorizonTelescope; #EHT; #Messier87; #Virgogalaxycluster; #Astrophysics; #USNationalScienceFoundation; #NSF; #EU's European Research Council; #ERC; #TheAstrophysicalJournalLetters; #FranceCórdova; #SheperdS.Doeleman; #HeinoFalcke; #EHTScienceCouncil; #PaulT.P.Ho; #EastAsianObservatory
New York, Apr 10 (Canadian-Media): Today, in coordinated National Science Foundation/Event Horizon Telescope (EHT) press conferences across the globe, The National Aeronautics and Space Administration (NASA) researchers revealed their success of unveiling the first direct visual evidence of a supermassive black hole and its shadow, NASA reports said.
Supermassive black holes have masses ranging from millions to billions of solar masses and appear to be in the center of almost all galaxies.
The Event Horizon Telescope (EHT) -- a planet-scale array of eight ground-based radio telescopes forged through international collaboration -- was designed to capture images of a black hole.
This breakthrough announcement was made in a series of six papers published in a special issue of The Astrophysical Journal Letters revealing the image of the black hole at the center of Messier 87, a massive galaxy in the nearby Virgo galaxy cluster. This black hole resides 55 million light-years from Earth and has a mass 6.5-billion times that of the Sun.
"This is a huge day in astrophysics," said NSF Director France Córdova. "We're seeing the unseeable. Black holes have sparked imaginations for decades. They have exotic properties and are mysterious to us. Yet with more observations like this one they are yielding their secrets. This is why NSF exists. We enable scientists and engineers to illuminate the unknown, to reveal the subtle and complex majesty of our universe."
Key funding was provided by the US National Science Foundation (NSF) -- funded more than $28 million in EHT research -- the EU's European Research Council (ERC), and funding agencies in East Asia.
The presence of these black holes affects their environment in extreme ways, warping spacetime and super-heating any surrounding material.
"This shadow, caused by the gravitational bending and capture of light by the event horizon, reveals a lot about the nature of these fascinating objects and allowed us to measure the enormous mass of M87's black hole," said Heino Falcke, chair of the EHT Science Council.
Multiple calibration and imaging methods have revealed a ring-like structure with a dark central region -- the black hole's shadow -- that persisted over multiple independent EHT observations.
Challenging work of creating the EHT represent the culmination of decades of observational, technical, and theoretical work and required upgrading and connecting a worldwide network of eight pre-existing telescopes deployed at a variety of high-altitude sites which included volcanoes in Hawai`i and Mexico, mountains in Arizona and the Spanish Sierra Nevada, the Chilean Atacama Desert, and Antarctica.
"Many of the features of the observed image match our theoretical understanding surprisingly well," said Paul T.P. Ho, EHT Board member and Director of the East Asian Observatory. "This makes us confident about the interpretation of our observations, including our estimation of the black hole's mass."
"We have achieved something presumed to be impossible just a generation ago," concluded Doeleman. "Breakthroughs in technology, connections between the world's best radio observatories, and innovative algorithms all came together to open an entirely new window on black holes and the event horizon."
(Reporting by Asha Bajaj)